The Operating Nut,valve, cataloged under National Stock Number 4820-01-222-3758, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-222-3758 |
| Primary Part Number | 31141-H1-160 |
| Item Name | Operating Nut,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| General Characteristics Item Description | HEXAGON HEAD,1.000 IN. ACROSS FLAT,BRONZE ASTM-B61,TAPERED BODY,1ST END FLANGED,THD INTERNALLY,LEFT HAND-DOUBLE ACME 5/8IN.-5 THD,2ND END THD EXTERNALLY 7/8IN.16 THD IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 31141-H 2 1/2 INCH | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 31141-H1-160 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 1305 ITEM 4 2 1/2 INCH | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1305-034-200 ITEM 4 | C/1 Advisory reference — outside the item-of-supply concept Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 31141-H | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 31141-H-160 | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 1305 | D/9 Drawing number reference only Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-222-3758 is a Operating Nut,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-222-3758 has 3 manufacturer part numbers on file: 31141-H 2 1/2 INCH (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 31141-H1-160 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1305 ITEM 4 2 1/2 INCH (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-233-0485. Verify interchangeability with system specifications before substitution.
Key specifications for 31141-H1-160: General Characteristics Item Description: HEXAGON HEAD,1.000 IN. ACROSS FLAT,BRONZE ASTM-B61,TAPERED BODY,1ST END FLANGED,THD INTERNALLY,LEFT HAND-DOUBLE ACME 5/8IN.-5 THD,2ND END THD EXTERNALLY 7/8IN.16 THD IN. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.